It is clear, then, that the earth must be at the centre and immovable, not only for the reasons already given, but also because heavy bodies forcibly thrown quite straight upward return to the point from which they started, even if they are thrown to an infinite distance. From these considerations then it is clear that the earth does not move and does not lie elsewhere than at the centre.

Greatness of spirit is accompanied by simplicity and sincerity.

The line between lawful and unlawful abortion will be marked by the fact of having sensation and being alive.

Knowledge of the fact differs from knowledge of the reason for the fact.

Of all the varieties of virtues, liberalism is the most beloved.

Everything that depends on the action of nature is by nature as good as it can be.

A friend is another I.